Sneha

Introduction to MUX and DEMUX Multiplexer 4-to-1 Multiplexer (MUX) Typical Application of a MUX Demutliplexer 1:4 DEMUX Typical Application of a DEMUX

This presentation will demonstrate

The basic function of the Multiplexer (MUX).

The typical application of a MUX.

A 4-to-1 MUX designed with Small Scale Integration (SSI).

A 4-to-1, 8-to-1, & 16-to-1 Medium Scale Integration (MSI) MUX.

The basic function of the Demultiplexer (DEMUX).

The typical application of a DEMUX.

A 1-to-4 DEMUX design with Small Scale Integration (SSI).

A 1-to-4, 1-to-8, & 1-to-16 Medium Scale Integration (MSI) DEMUX.

A 7-segment message display using MUX/DEMUX

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A multiplexer is a combinational circuit that accept input from 2n lines and give the output on a single output line.

A MUX is a digital switch that has multiple inputs (sources) and a single output (destination).

The select lines determine which input is connected to the output.

MUX Types 2-to-1 (1 select line) 4-to-1 (2 select lines) 8-to-1 (3 select lines) 16-to-1 (4 select lines)

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I0, I1, I2, I3 are four inputsI0, I1, I2, I3 are four inputs Y is the output Y is the output Sel_0 and Sel_1 are the two select lines.Sel_0 and Sel_1 are the two select lines.

Expression :I0.sel_1’.sel_0’+I2. sel_1’.sel_0+ I2.sel_1.sel_0’+ I3.sel_1.sel_0

Data Select inputs Output y

Sel_1 sel_0 Input Selected

0 0 I0

0 1 I1

1 0 I2

1 1 I3

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MP3 PlayerDocking Station

Laptop Sound Card

DigitalSatellite

DigitalCable TV

Surround Sound System

MU X

D0

D1

D2

D3

Y

B ASelected Source

0 0 MP3

0 1 Laptop

1 0 Satellite

1 1 Cable TV

Multiple Sources

Single Destination

Selector

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A DEMUX is a digital switch with a single input (source) and a multiple outputs (destinations).

The select lines determine which output the input is connected to.

DEMUX Types 1-to-2 (1 select line) 1-to-4 (2 select lines) 1-to-8 (3 select lines) 1-to-16 (4 select lines)

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D0, D1, D2, D3 are four outputs.D0, D1, D2, D3 are four outputs. Data i\p is the input line.Data i\p is the input line. Sel_0 and Sel_1 are the two select lines.Sel_0 and Sel_1 are the two select lines.

Select Lines Output Lines

S1 S0 D0 D1 D2 D3

0 0 1 0 0 0

0 1 0 1 0 0

1 0 0 0 1 0

1 1 0 0 0 1

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Single Source Multiple Destinations

Selector

D0

D1

D2

D3

X

DE

MU

X

B ASelected

Destination

0 0 B/W Laser Printer

0 1 Fax Machine

1 0 Color Inkjet Printer

1 1 Pen Plotter

B/W LaserPrinter

Color InkjetPrinter

PenPlotter

FaxMachine

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